Time will heal it, PT will help for it to heal a bit better. Mind you have torn it, thus you will have scar tissue in the knee. Scar tissue is denser, thicker and tougher, it will affect how the knee operates and will, years down the road, lead to arthritis-like symptoms if not arthritis itself. As long as nothing has completely separated, then time is the best thing to use to 'fix' it. If the Patella was completely broken in twain and separated, then you may need to have it removed (or there may be a way to set it together again) the a ligament or tendon completely snaps then you need to have it rejoined surgically. If not, then your chances of successful healing are high. Of course if you run around, or jump, or otherwise compound the problem then your chances of healing successfully are lowered. Physical Therapy will help to keep the tendon and muscle moving during the healing process. We have discovered that keeping a patient moving with such things as joint surgeries/injuries means that they will heal stronger and better than if we keep them from moving. Thus Physical Therapy has a lot of exercises that you will do at home to flex and move the knee gently (no marathon runs yet) which are designed to prevent calcification, or scar tissue from really messing up your knee.

Well it has been over a month ago and the pain has not improved. It may have even gotten worse. It hurts to walk and when I bend my knee completely I get sharp pains shooting down my shin. I am afraid that physical therapy will make it worse.